Preparation method of high-quality spherical nickel powder

A high-quality, nickel powder technology, applied in the field of preparation of high-quality spherical nickel powder, can solve the problems of poor powder shape and poor deformation ability

Inactive Publication Date: 2017-05-31
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a method for preparing high-quality spherical nickel powder, which solves the problem of poor deformability caused by poor powder shape during the preparation of metallic nickel by additive manufacturing technology; The metal nickel after forming has uniform composition, fine structure and excellent performance, which meets the requirements of engineering applications

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  • Preparation method of high-quality spherical nickel powder

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Effect test

Embodiment 1

[0020] A preparation method of high-quality spherical nickel powder, comprising the following steps:

[0021] 1) According to the ingredients of pure nickel, nickel rods are smelted by vacuum induction melting and electroslag remelting;

[0022] 2) Finish turning the smelted nickel rod into an electric shock rod. The diameter of the processed electrode rod is 55mm, the length is 500mm, the roundness deviation is 0.03mm, the straightness deviation is 0.045mm / 450mm, and the roughness is 1.22μm;

[0023] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 2×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.13MPa;

[0024] 4) The power of the plasma gun of PREP powder making equipment is 200kW. The plasma torch contains tungsten cathode and copper anode. The electrode rod is not used as an electrode. The plasma heats the end of the electrode rod. Melting, the atomized droplets are thrown out from the e...

Embodiment 2

[0029] A preparation method of high-quality spherical nickel powder, comprising the following steps:

[0030] 1) According to the ingredients of pure nickel, nickel rods are smelted by vacuum induction melting and electroslag remelting;

[0031] 2) Finish turning the smelted nickel rod into an electric shock rod. The diameter of the processed electrode rod is 75mm, the length is 650mm, the roundness deviation is 0.025mm, the straightness deviation is 0.025mm / 650mm, and the roughness is 0.58μm;

[0032] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 7×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.14MPa;

[0033] 4) The power of the plasma gun of PREP powder making equipment is 100kW. The plasma torch contains tungsten cathode and copper anode. The electrode rod is not used as an electrode. The plasma heats the end of the electrode rod. Melting, the atomized droplets are thrown out from the ...

Embodiment 3

[0038] A preparation method of high-quality spherical nickel powder, comprising the following steps:

[0039] 1) According to the ingredients of pure nickel, nickel rods are smelted by vacuum induction melting and electroslag remelting;

[0040] 2) Finish turning the smelted nickel rod into an electric shock rod. The diameter of the processed electrode rod is 65mm, the length is 800mm, the roundness deviation is 0.06mm, the straightness deviation is 0.04mm / 800mm, and the roughness is 1.23μm;

[0041] 3) Load the electrode rod into the reaction chamber, and evacuate the reaction chamber to 3×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.14MPa;

[0042] 4) The power of the plasma gun of PREP powder making equipment is 300kW. The plasma torch contains tungsten cathode and copper anode. The electrode rod is not used as an electrode. The plasma heats the end of the electrode rod. Melting, the atomized droplets are thrown out from the en...

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Abstract

The invention provides a preparation method of high-quality spherical nickel powder. The preparation method comprises the following steps: 1) finely machining a melted nickel rod to form an electrode rod; 2) loading the electrode rod into a reaction chamber; vacuumizing the reaction chamber and feeding inert gas into the reaction chamber according to a certain ratio; 3) by adopting a plasma torch comprising a tungsten cathode and a copper anode, heating the end part of the electrode rod and uniformly smelting the end part; throwing out atomized liquid drops from the end part of the electrode rod; rapidly cooling the liquid drops in an inert gas environment to form spherical grains, and enabling the spherical grains to fall into a collector, wherein the electrode rod is not used as an electrode; 4) sieving and packaging prepared pure nickel powder under an inert gas protection environment. The pure nickel powder prepared by the method has the characteristics of ultrafine property, high purity, high-grade spherical shape and no hollow powder and satellite powder.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy preparation, and in particular relates to a preparation method of high-quality spherical nickel powder. Background technique [0002] Nickel is one of the most widely used materials in industry. Pure nickel has excellent corrosion resistance, high electric vacuum performance and electromagnetic control performance, as well as excellent welding performance, processing performance and good mechanical properties. Therefore, pure nickel Nickel is widely used in chemical industry, mechanical electronics, food, etc., and it is also increasingly used in special-purpose parts, machine manufacturing, rocket technology equipment and other products. Pure nickel has a high melting point, good mechanical properties, cold and hot pressure processing performance, and excellent corrosion resistance. It is the best material for heat-resistant concentrated alkali solution corrosion, resistant to neutral a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10
CPCB22F9/10
Inventor 相敏刘洋韩志宇闫飞陈以强宋嘉明王晨王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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